From 046f4f0af7fd1fad06793d863d288c6b2cd84e99 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Thu, 8 Sep 2022 11:51:12 +0200 Subject: drm/udl: Fix potential URB leaks A couple of error handlings forgot to process the URB completion. Those are both with WARN_ON() so should be visible, but we must fix them in anyway. Fixes: 7350b2a3fbc6 ("drm/udl: Replace BUG_ON() with WARN_ON()") Acked-by: Thomas Zimmermann Signed-off-by: Takashi Iwai Signed-off-by: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/20220908095115.23396-10-tiwai@suse.de --- drivers/gpu/drm/udl/udl_main.c | 8 +++++--- drivers/gpu/drm/udl/udl_transfer.c | 5 ++++- 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/udl/udl_main.c b/drivers/gpu/drm/udl/udl_main.c index 2b7eafd48ec2..de28eeff3155 100644 --- a/drivers/gpu/drm/udl/udl_main.c +++ b/drivers/gpu/drm/udl/udl_main.c @@ -260,11 +260,13 @@ int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len) struct udl_device *udl = to_udl(dev); int ret; - if (WARN_ON(len > udl->urbs.size)) - return -EINVAL; - + if (WARN_ON(len > udl->urbs.size)) { + ret = -EINVAL; + goto error; + } urb->transfer_buffer_length = len; /* set to actual payload len */ ret = usb_submit_urb(urb, GFP_ATOMIC); + error: if (ret) { udl_urb_completion(urb); /* because no one else will */ DRM_ERROR("usb_submit_urb error %x\n", ret); diff --git a/drivers/gpu/drm/udl/udl_transfer.c b/drivers/gpu/drm/udl/udl_transfer.c index a431208dda85..b57844632dbd 100644 --- a/drivers/gpu/drm/udl/udl_transfer.c +++ b/drivers/gpu/drm/udl/udl_transfer.c @@ -180,8 +180,11 @@ int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr, u8 *cmd = *urb_buf_ptr; u8 *cmd_end = (u8 *) urb->transfer_buffer + urb->transfer_buffer_length; - if (WARN_ON(!(log_bpp == 1 || log_bpp == 2))) + if (WARN_ON(!(log_bpp == 1 || log_bpp == 2))) { + /* need to finish URB at error from this function */ + udl_urb_completion(urb); return -EINVAL; + } line_start = (u8 *) (front + byte_offset); next_pixel = line_start; -- cgit v1.2.3-58-ga151